/Engine/Source/Editor/SequenceRecorder/Public/ISequenceRecorder.h
Adds a new recording group and picks a default name. Returns the new recording group and sets as the current recording group.
[TWeakObjectPtr](API\Runtime\Core\UObject\TWeakObjectPtr)< [USequenceRecorderActorGroup](API\Editor\SequenceRecorder\USequenceRecorderActorGroup) > AddRecordingGroup()